一架飞机飞翔在两个城市之间,顺风要2h45min,逆风要3h,已知风速是20km/h,则两城之间的距离为( ).
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![一架飞机飞翔在两个城市之间,顺风要2h45min,逆风要3h,已知风速是20km/h,则两城之间的距离为( ).](/uploads/image/z/4453359-15-9.jpg?t=%E4%B8%80%E6%9E%B6%E9%A3%9E%E6%9C%BA%E9%A3%9E%E7%BF%94%E5%9C%A8%E4%B8%A4%E4%B8%AA%E5%9F%8E%E5%B8%82%E4%B9%8B%E9%97%B4%2C%E9%A1%BA%E9%A3%8E%E8%A6%812h45min%2C%E9%80%86%E9%A3%8E%E8%A6%813h%2C%E5%B7%B2%E7%9F%A5%E9%A3%8E%E9%80%9F%E6%98%AF20km%2Fh%2C%E5%88%99%E4%B8%A4%E5%9F%8E%E4%B9%8B%E9%97%B4%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA%EF%BC%88+%EF%BC%89.)
一架飞机飞翔在两个城市之间,顺风要2h45min,逆风要3h,已知风速是20km/h,则两城之间的距离为( ).
一架飞机飞翔在两个城市之间,顺风要2h45min,逆风要3h,已知风速是20km/h,则两城之间的距离为( ).
一架飞机飞翔在两个城市之间,顺风要2h45min,逆风要3h,已知风速是20km/h,则两城之间的距离为( ).
设飞机时速是x
(x+20)*2.75=(x-20)*3
2.75x+55=3x-60
-0.25x=-115
x=460
距离(x+20)*2.75=1320